$neoMap: map-merge($neoMap, (
    'tab-button-background-image'               : none,
    'tab-button-background-image-bottom'        : none,
    'tab-button-background-image-left'          : none,
    'tab-button-background-image-pressed'       : none,
    'tab-button-background-image-pressed-bottom': none,
    'tab-button-background-image-pressed-left'  : none,
    'tab-button-background-image-pressed-right' : none,
    'tab-button-background-image-right'         : none,
    'tab-button-border-radius'                  : 0,
    'tab-button-glyph-color'                    : #bbb,
    'tab-button-glyph-color-active'             : #1c60a0,
    'tab-button-glyph-color-over'               : #1c60a0,
    'tab-button-glyph-color-pressed'           : #1c60a0,
    'tab-button-text-color'                    : #2b2b2b,
    'tab-button-text-transform'                : uppercase
));

@if $useCss4Vars == true {
    :root .neo-theme-light { // .neo-tab-header-button
        --tab-button-background-image               : #{neo(tab-button-background-image)};
        --tab-button-background-image-bottom        : #{neo(tab-button-background-image-bottom)};
        --tab-button-background-image-left          : #{neo(tab-button-background-image-left)};
        --tab-button-background-image-pressed       : #{neo(tab-button-background-image-pressed)};
        --tab-button-background-image-pressed-bottom: #{neo(tab-button-background-image-pressed-bottom)};
        --tab-button-background-image-pressed-left  : #{neo(tab-button-background-image-pressed-left)};
        --tab-button-background-image-pressed-right : #{neo(tab-button-background-image-pressed-right)};
        --tab-button-background-image-right         : #{neo(tab-button-background-image-right)};
        --tab-button-border-radius                  : #{neo(tab-button-border-radius)};
        --tab-button-glyph-color                    : #{neo(tab-button-glyph-color)};
        --tab-button-glyph-color-active             : #{neo(tab-button-glyph-color-active)};
        --tab-button-glyph-color-over               : #{neo(tab-button-glyph-color-over)};
        --tab-button-glyph-color-pressed            : #{neo(tab-button-glyph-color-pressed)};
        --tab-button-text-color                     : #{neo(tab-button-text-color)};
        --tab-button-text-transform                 : #{neo(tab-button-text-transform)};
    }
}